Drum for vapors under pressure



Sept; 20, 1932. H. J. KERR DRUM FOR VAPORS UNDER PRESSURE l Filed Sept. 25. 1928 INVENTO JM ATTORNEYS Patented Sept. 20, 1932 lUNITED STATES PATENT OFFICE HOWARD J'. KERR, 0F WESTFIELD, NEW JERSEY, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, JERSEY, A CORPORATION OF NEW JERSEY DRUM FOR VAPORS UNDER PRESSURE Application ledvseptember 25, 192B. Serial No. 308,322.

This invention relates to a device that is suitable for withstanding internal pressures of hot vapors. It comprises a cylinder with a removable head that permits expansion and contraction with temperature changes and is 'maintained permanently tight. The invention is especially suitable as a drum for Va mercury boiler, but is not restricted to this .particular use. The invention will be underthe accompanying drawing in which Fig. 1 is stood from the description in connection with nal pressure of hot vapors. The end of the drum is beveled on the inside as shown at 2,

Vand a head 3 is inserted in the end of thev drum. The head 3 is provided with a sloping ,annular flange 4 with a beveled surface 5 corresponding to the surface 2 of the drum 1.

An annular groove 6 is provided on the inside of the beveled portion of the drum 1 near the end of the drum and a ring 7, preferably square in cross section, is placed in thegroove 6. rIhe ring 7 may be made up of sections 5 that are inserted separately and-the ends thereof may be afterward welded together as indicated at 8. The edge of the flange 4 may rest against the ring 7 so that the ring takes the thrust due to pressure inside of the drum and prevents the head 3 from being displaced. rlhe outer edge of the ring 7 may be welded "by an annular weld 9 to the outside edge of the groove 6, and the inner edge of the ring 7 welded by an annular weld 10 to the thin edge of the flange 4 of the head 3, thus providing a gas tight joint as shown in Fig. 1. The same result may be secured by welding the thin edge of the 'head flange 4 directly to the drum inside of the thrust ring 7 and incidentally to the ring as shown in Fig. 3.

The iiange 4 isflexible so that the drum 1 and the head 3 ma expand to dierent extents, especially ra ially, without causing injury to the weld metal at the joint between the two which would cause a leak. rlhe oint is especially suitable for maintaining tightness under varying internal pressures and temperatures because the weld is made at the thrust ring and the Weld metal itself is not damaged by over stressing because of' the pressure or the temperature efects on the metal structure of the drum 1 and head 3. When this device is used as adrum for a mercury boiler, the usual depending tubes in whlch the mercury vapors are generated, can be attached and inlets for mercury and outlets for mercury vapors can be provided inthe usual way.

I claim:

1. A drum and end closure therefor, the two having annular engaging walls with cooperating surfaces, a recess in the drum annulus exteriorly of the closure and having surfaces normal to the axis of the drum, a ring seated in said recess and receiving-outward thrust of the closure, and welding uniting thedruin, closure and ring in vapor, Y

tight relation.

2. A. drum and end closure therefor,rthe

two having annular engaging walls With cooperating beveled surfaces, the beveled surfaces of the closure being attenuated 4to impart flexibility, a recess in the drum annulu-s ext/eriorly of the closure and having sur faces normal to the axis of the drum, a rin seated in said recess and receiving outward thrust of the closure, and welding uniting the drum, closure and ring in vapor-tight relation.

3. 'A drum and end closure therefor, the

two having attenuated annular engaging walls, with cooperating beveled surfaces, aY

recess in the drum annulus exteriorly of the closure and having surfaces normal to the axis of the drum, a ring seated in said recess y'and receiving outward thrust ofthe closure, and welding uniting the drum, closure and ring in vapor-tight relation.

4. A pressure drum and end closure therefor, the two having annular engaging suri faces, a recess in the drum annulus exteriorly of the closure, a ring formed of multi-parts and seated in said recess then integrally connected by welding and receiving the outward thrust of the closure, and welding uniting the drum, closure and in vapor-tight p relation.

' 5. A drum and end closure therefor, the two having annular en ging walls with cooperating beveled sur aces, a recess in the annulus exteriorly of the closure,` a

formed of multi-parts and seated in s sai r ecess then integrally connected by welding and receiving the outwardthrust of the closure, and welding uniting the drum, closure and ring in vapor-tight relation. n

' 6. A pressure drum and end closure therefor, the two having inclined cooperating en- Y gaging surfaces, the closure increasing in diameter from the inside out, a recess in the drumannulus exteriorly of the closure, a ring formed of multi-parts and seated in said recess then integrally connected by` welding yand receiving the outward thrust of the closure, and welding uniting the drum,- closure and rlng in vapor-tight relation.

7. A drumvand end closuregtherefor, thetwo having annular engaging walls with cooperating beveled surfaces a recess in the drum annulus exteriorly of the closure and having surfaces normal to the axis of the drum, a ring formed of multi-parts and seated in said recess then integrally connected by welding and receiving outward thrust of the closure, and welding uniting the drum, closure and ring in vapor-tight relation.

8. A drum and end closure therefor, the

two ha annular engaging walls with cooperating eveled surfaces, the beveled surfaces of -the closure being attenuated to impart flexibility, a recess in the drum annulus exteriorly of the closure and having surfaces v normal to the axis of the drum, a ring formed Y of multi-parts and seated in said recess then integrally connectedby welding and receiving outward thrust of the closure, and welding uniting the drum, closure and ring in vapor-tight relation.

9. A drum and end closure therefor, the two having attenuated annular engaging walls, with cooperating beveled surfaces, a recess in the drum annulus@ exteriorl of the closure and having surfaces norma to the axis of the drum, a ring formed of multirts and seated in said recess then integraly connected by welding andreceiving outward thrust of the' closure, and welding unit' ing the drum, closure and ring in vapor-tight relation.

vHWABLD J KERR. 

